Appliance control knob



FIG. 1 is a front elevation view of an appliance control knob showing my new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a back side elevation view thereof;

FIG. 7 is a first perspective view thereof; and,

FIG. 8 is a second perspective view thereof.

The dot-dash style broken lines in FIG. 6 illustrate a boundary of the design, the region within this line being unclaimed. 

CLAIM The ornamental design for an appliance control knob, as shown and described. 